AIR COMPRESSOR (cont)
CLEANING, INSPECTION, AND REPAIR (cont)
Use a feeler gauge and measure radial clearance between oil pump plunger (104) collar and crankshaft eccentric.
Refer to table 4-1 for dimensions.
Maximum runout of 0.001 inch (0.03 mm) must be checked at depot level maintenance facility.
Replace damaged crankshaft (115).
Clean, inspect, and repair cylinders (82) and (85) by the following:
Use drycleaning solvent and remove dirt, grease, and oil from cylinders (74) and (78). Dry with compressed air.
Ring travel surface should not be scored and should not have ridges.
Use a honing drill and hone cylinder walls to a bright, smooth finish.
If cylinder flanges are machined, check that cylinder length is not shortened beyond the minimum limit.
This is determined by installing piston in top dead center position and ensuring piston is flush or below top
face of cylinder.
Use a dial indicator and true both ends of bore and flange face. Inspect perpendicularity of low-pressure cylinder
(82) and high-pressure cylinder (85) to flange face. Maximum variance is 0.002 inch (0.05 mm) If variance
exceeds maximum, machine cylinder flanges.
Use a feeler gage and measure cylinder-to-piston clearance. Refer to table 4-1 for clearance dimensions. If
cylinder-to-piston clearance is not within limits, replace piston with a new, standard size piston. Recheck
cylinder-to-piston clearance. If not within limits, replace cylinder with a new, standard size cylinder.
Replace damaged low-pressure cylinder (82) and high-pressure cylinder (85).